- ✓Perabolic
- BCircular
- CStraight line
- DHelical
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The mass equivalent of 931 MeV energy is
|
(a) 1.66 |
(b) 6.02 |
(c) 1.66 |
(d) 6.02 |
A photodetector is made from a semiconductor In 0.53Ga 0.47As with Eg = 0.73 eV. What is the maximum wavelength, which it can detect
|
(a) 1000 nm |
(b) 1703 nm |
(c) 500 nm |
(d) 173 nm |
The heat generated through 2 ohm and 8 ohm resistances separately, when a condenser of 200 μF capacity charged to 200 V is discharged one by one, will be
|
(a) 4 J and 16 J respectively |
(b) 16 J and 4 J respectively |
|
(c) 4 J and 8 J respectively |
(d) 4 J and 4 J respectively |
In the experiment of potentiometer, at balance, there is no current in the
|
(a) Main circuit |
|
(b) Galvanometer circuit |
|
(c) Potentiometer circuit |
|
(d) Both main and galvanometer circuits |
The phenomenon by which light travels in an optical fibres is
|
(a) Reflection |
(b) Refraction |
|
(c) Total internal reflection |
(d) Transmission |
Nuclear fission was discovered by
|
(a) Auto Hahn and F. strassmann |
(b) Fermi |
|
(c) Bethe |
(d) Rutherford |
The thermo e.m.f. of a thermo-couple is 25μV/℃ at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as
, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is
|
(a) 20 ℃ |
(b) 16 ℃ |
(c) 12 ℃ |
(d) 8℃ |